CVE-2026-41090

Microsoft · Published May 21, 2026

9.3

CVSS v3.1

CRITICAL

Patch availableGet patch

Description

Microsoft Copilot Tampering Vulnerability. Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.

Affected Products

Microsoft 365 Copilot for iOS

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C